Apparatus for printing photographic prints from negatives



BEST AVAILABLE COP Dec. 30,, 1,521,399

l. D. SHARP 1 APPARATUS FOR PRI TING momoemriilc rniri'rs PROM useuxvzs Fi'ld .Sepfc. 9, E5722 2 Stuntman 1 INVENTOR Ira/.0. Slcaly ATTORNEYS WITNESSES Patented Dec. 30, 1924.

BESTA VNLABLE COP:

IBAJI SHARP, OF NICHOLASVILLE, KENTUCKY speed.

' APPARATUS FOR PRINTING PHOTOGRAPHIC PRIHTS FRO M NEGATIVES. v

2 Application filed September.

Toa-ZZ whom it may concern: Be JtkIlOAII that I, InA D. SHARP, a c tizen of the United'States, and resident of j Nicholasville, in the county of Jessamine and State of Kentucky, have invented certain new and useful Improvements in Apparatus for Printing Photographic ;.'Prints from Negatives, 01 which the following is a specification. v v I 1 p .This invention relates to anapparatus for negatives. r e p i An object of the invention is the provision of a ,device for printing photographs 111 'which the intensity of the light may be varied-as the density of the negatives and in which the time of exposure remains con stant for photographic papers of constant A further object of the invention isto pro vide a device for printing photography-I .ing an automatically ;,controlled time ele- 'ienttor operating aI-switch of an: electriclighting circuit toclose the circuit-whereby the proper exposure may be had. Means are alsoemployed in connection with the time element for varying the time of exposure according to the sensitiveness of the paper. 1 In the accompanying drawings forming a part of this ap lication and in which. like reference numerals are employed to designai'e like pai-tstliroughout the same,

- Figure 1 is a view in perspective of the apparatus for the printing oi photographic prints from negatives.

Figure 2 is a longitudinal vertical section of the same.

Figure 3 is a transverse horizontal section k'Ll'l'Ull the line 3-3 of Figure 2.

Figure l is a dia-gran'nnatic representation ot-lhe wiring;

Referring to the drawings, 1 designates a table having pairs oi standards or legs adapted to support the top of the table in an elevated position above the floor of the room and at a. height above said floor which is-niost convenient for manipulating certain parts of the apparatus.

At-the one end and in the top'of the table is formed a rectangular opening 2 below which andto the under face of the table is ierably in the form of a sheetiot' glass is 9, '1922. se -a1 s 587,098.

mounted overthe opening 2 and in a countersunk groove formed adjacent the periphery of the opening 2 whereby the top of the lass lwill be flush witl the upper, surface. oi the table 1 the glass at forming a support for the photographic-paperoand the negative l3.

The/"end walls ofthe cabinet 3 are slotted as shown at 7 n Figure 1,' the slots being I adaptedltogreceive agroundglass 8.

Upon'the floor 9ottheicabinet are se cured-sockets 10, 11, l2,an d 13 which are adapted to i'espectively receive and support light bul $$,l4, '15 l6 and 17.-

Secured; to th e bottom of the cabinet 3 are a pair of spaced brackets-18 having insulating members 19 adapted tosupport a conductor 20 in the shape of a hfollowrod. To the socket-'10 'is sc'tured' a switch 21 formed of resilient nieti'ilgsue lras brass and having a:spring'meinber22sec red to the under face of the switch with the; outerends of the switch and/springsspaced from each other and located above the conductor 2( To the sockets 12 and 131 are respectively secured switches 23 f iiiid 2 4; having Ia' spring member 22 secured to the lsivitch with the free end of the spring and switches spaced above the conductor 20. Similarly disposed operating rods 25, 26 and 27 are vertically mounted at one side of the cabinet 3 and are adapted to respectively operate the switches 21, 23 and 24. i I v The insulating members 19 are held in position between the brackets 18 and a bar 28 with the last mentioned bar provided with a plurality of perforations which are adapted to receive the lower ends of the operating rods 25,26 and 27. The upper ends of the said operating ,rods project through openings 29 in the top of the table 1. Each rod is provided with a shoulder 38 and thereby forming a reduced handgrip 31 with theshoulder 30 being adapted to engage the under face of the table 1 adjacent the passage 29 and lock the .rod in its lowermost position for maintaining the switch 21 and spring 22 in engagement with the conductor 20.-

To a bloclr32 secured transversely of the table top are hingedly connected the arms 33 which carry a. platen The length of the arms and the position otthe pix-"oral conection oi the arms with the block 32 ,is such as .to permit the platen wheninovedrto BEST AVAILABLE COPY its lowermost position to cover the t-ransto have contact after release of the penpai'ent plate 4 over the opening 2 and maindulum 42 and about the time that the pentainthe'pho'togifaphic p'a e senii negative jdu'liiinjjfiisf loefated Mittfigtitikg Vghile I (i iniiri'ii' engagement with the tfansparent have shown thesco1itadtadapthd toengage plate 4. A bracket arm projects"out-when'the pendulum is located in the verwardly from the lowerendof:-..one1o;t' the itical :theizfiaid contacts may be caused to supporting arms 33. To the free end of engage at any other position of said penthis aim is-connected one end of aspring 'duIum'I- The resilient :contact 151': permits 35 with the other end of the spring secured the pendulum to continue its oscillation be to an eye bolt 37 adjustably mounted in a*ybnd 'th'werucals bracket Thespring 36 t end s1to 'nain- A pair of wires 53 and are connected ean the platen 34 in its most elevated posi- With a plug adaptdftd'fbe screwed into a ti'ofu" aboye thetransparent member-' {and wall socket connectedwith source of c11rotenga'genient with the same; -rentf i'llhegtwo wire for convenience are adjacent an opening 39 in the table top locatedd l a 'pl'ateo having an open'ing lliin ac'lifio thjer iitflivith the opening or passage' 39. "-"th 1 oaghf: aii open the? same Q conduit and insuflated leading in he cab net 3 is g post of the red the area of'tlie opening being greatestivhere lightl? which is normally in circuit to give said opening is formed through the under face ofthe tabl'e'l. 1

A pendulum {12 having a pivot pin is a all times when therprii'iting d u .isi rr ret ee i r nected to the etherbihdi'ng post of the sockmounted in bearings formed in the plate Q h W 541$ OO i I t6 the-bind 14-0 whereby the pendulum is free tO OScilla te p -p d E Qi B s e b e ts 0f the 'th 'falined openings 39 a d 41, 11g $15,116; and 141*Thehollow'conductor .the supporting arm 33 of the platen 34: pi-oleads to andis connected tdt-he'resilient'conlectsftlircu gli an Opening in the'ftob, of L F 51km he -s x connected tlie, table with the free end of th nn Wltli the lHOVflblB COn tiifi 52 returns to the to the lower section of the pendulum 12. H w x:

A bumper48 secured to thefrearjside'. Ref r ng-t "F g connectedto a spring 46. A flexible meincabinet 3 and isconnected with the leading bmdmg post 57 of the rediii'liii' Jl: w"

lj the wiring -diawall ofthefcalbinet 3 projects laterally/out" gmHf'lS"Sh Wn ln d lead-1111111? 53 fdhI'u- M@1 5- g d h AQ a d" i is carried to the binding post of -therred f'iidapt ed to engagesaid pendulum and nia'i'n gl and {helm-6&0'i'fllehmovflble coniflfl tain the same in a position, inclined t0jth "SW1tCl1 o2 through t'he"current passing vertical as shown in Figure 2 and when the h g Coma-Ct l g the Wire pram is maintained in its mostielevatcd thECOMh-ICWF'QO d' ence through the bositiou by the springs 36. The resilient. switches 21, Khalid-24 through the ncuiwed 'br'acketfarm -14 dependingdrom 20'is'c onn 'ectedby means'ofa wire which li' G1'libG1'.-l-6 and the flexible member 4-? con- PS 16 and 1531161 H1911 t' nesting the pendulum 42 with the arm 4st the WIN 54%,13118 pl g.-

.which latter is connected with the platen The lamp 1 1 is of a celfltain'candle power 3-1. form a connection between the pendulum h h is nfl cient to print the most transfund the platen for retaining the pendulum P 2 and isdesignamd as 1 light "in engagement with th bump r 48 h unit: the lainp ltiis of suflicient candle pow the platen is elevated as shown in Figure"2 er when comparedto lamp 1 1 to give 1 lid bl i ht 49 i m t d 1 1 light units; the lamp 15 as compared to "lower end of the pendulum 42 and mainl mp 14 will give 2 light units. By this artained in any one of a plurality of posi--- rangement and the relation between the v tions along the lower end of the pendulum different lamps "many diiierentcombinations by means of a set. screw. A second slidof g t Units 2 had depending P able weight 50 is mounted upon the upper the (16 11 0f g e to be prm edend of thependulum and above its pivotal If it be desired to have 2 light units for "point 43 and cooperates with the weight l-5? certain negatives rods 25 and 26 will be detosubstantially shorten the pendulum and pressed thereby placing lamps 14 and 16 in thereby" provide a more rapid oscillation of circuit and giving 2 'light-n1iits, or lamps the pendulum. 15 and 16 may be thrown in the same circuit A resilient contact 51 is mounted on the by per ing rod 26 (111d t y gw ng plate 40 adjacent the pivotal connection of light unitsz or "lamps l t and 15 may be u the pendulum 42 and is adapted to engage {placed in circuit by operating rods 25 and a contact 52 movable relative to the con- 27, thereby giving'3 light units or all three tact 51'andmounted on the pendulum rods may be depressed thereby giving 4 lii l adjacent the uiper free end of the contact light units. If it be desired to increase the 51. 'The mem ers 51 and 52 are adapted number of light unitsa'lainp will be added The operation of my device BEST AVAILABLE COP\' :to the ca-bi net 3 and" placed ini circuit with a corresponding operating rod and switctn; the "light unitsof whichwill be slightly great-er than allot. the light-units combined .which "'5 are nowshown in the said cabinetsuchas i'torzinstance ailampi-that :Wlll give at least five light unitsi This additionallamp can "be eombine'dwvithother lampsto form new combinations of'light units. 1

Z "In the use of the ordinary incandescen "damp itiwill' he observed that the spot'directly above the incandescent :tilament of the lamp will give the greatest intensity-otlight and therefore I cover the top of the globe 5 by ineans; of some semi-transparent mater-ialas shown at 58 for preventing this intense light from 'eli'ecting one particular 'spot ion the printingpaper avhichis directlyover'the filament. i 1

is as follows: The plug. connect-ed tosthe wires and (dis inserted in the usual socketrin the wall of a aroomwhereby the lamp 1? which has a red globe. is illuminated thereby giving suiliiscient light for operatingvthe device without effectingthe printing paper. The negative -(i is placed on the transparent covering t over-the opening-in the top of the cabinet 3 n'ith'theprinting paper .5 placed on 'the top fsaid-negative with the sensitive portion platenis 'moved rapidlv through 'the openm g- 45 in the top of the table and-releases tlie =tension of the spring 46 and thereby permitting the pendulum 4-2 to freely .os-

cillate. As shown in Figure 2, when-the "pendulum is moved to a vertical position the'contact nie1nbers'51 and 52 will make instant contact and cause the circuit to pass through the wires :75 and 56, conductor-20,

switch 21, and illuminating lamp 14. The instant that the pendulum passes the line 61 indicating the vertical position of the pendulum on its return. stroke the current -will be'hroken and lamp 14- will be extinguished.

I If it be desired to use more than one lamp 1 such as Hand 16. both rods'25 and 26 will Qh'e moveddownwardly and lock the switches 21 into' engagement with the conductor so that Whenthe platenB-tis again operated We its lowe'rmost position the-pendulum 4:2

\vi llbe released and again I pumide rcontacts between theix nemhers :51 land-1: for tan instant closing 5 of the circuit; and illuminatingdainpsl t and 1B. The springr Bfizilways. returns the-platen 34-;to itsrmost filevatedposition with the pendulum 542 intengagementzwith: the bumper:Ai8uandnthe ebnans-:51- and-52 out of engagement. 35'

It i will be; noted *thaflWhen the pendulum A2 is released audi -reaches: theave'rticalilinefl 1161 the contactsi5l and 52;:WilLenga-geseach other and a-emain, in engagement. untilwthe pendulum on i -its. i return-2- stroke? passes ithe vertical; line; 61. Wheni theplaten 184s is'ire- ;leased the. 'pendulum- 42 will be maintained in the inclined: position 2 shown in iF-igure v2. ItR-it he desired to provide fohshorter time exposures the slidable weightrttliisinreved lltlr'to the pivot43aof thezgpenduluin as it is desired to limit ,theiengagemenmbgq e afi the contacts 51- and -52--when;tliependuliilihiis oscillating beyond the-vertical line. -;6l;p;;flihe adju'stment of thenneights- 49.;and ifiOieither increases ;or decreases thefitime of. vibratien -of the pendulunrandtthereformthe tinie-Fof contact between the nier'nbersi5land .52'1and therefore .thel exposure J of: the} light; within the .cabinet" 3; 5 vlvhenwnecessaryri "all-rthnee lights or any i combinationaof lights: may be employed for exposing thelprints. s: .Iiwfvia;

5 When any: 0t the rods 125;; 26? or are depressedi thei switch 512]." being made: not spring material :is (tended downwardly with the spring member 22 inevingiinadvandeibf the switch and ie'nga ging the conductor -20. 5 When the shoulder 30: as. said rods is engag ed with the) under face of :the table; 1- the spring '22 :and the: switch QhWiIL-be loekd in face. to itace engagement and 1011 the conductOr Q0. I NVhenth'e shoulder- 30 is released 1435 from theperipheryof-theipassage 29. ,ofthe table the: switch 21 will .be' tii'st to move. upwardly While the spring -QQEWiII he somewhat delayed-"in its progressbeforcgbeing elevated out. of contact W=ith the conductor 20 and therefore theirods 25, 26' and -27 \VlllIlOt he forced rapidly out of their-.passages with-in 1 the aligned i'PHSSflQS through which the rodsfoperate in the: table 1' and the=bar 28; =-'l he.upwardinovement ofvtheswitch 21 is therefore restrain e'dthrough-the coopei'atio1ro;t the spring 22; The spring also compensates for Wear. I

.lVhat I claim is: 1

net having a printing opening in the top and a sheet of glasssupported over the. opening, a ground glass .spaeed froin thetopening and supported in the cabinet. 19.11; electrically controlled illuminating-device in the 12-3 cabinet below the ground'glass for .supplying a nvhi' light, a eircinit connected with the illuminating device,- li'iea-lis coiinected with the circuit for varying, the intensity of the light supp1ied,x afi;plate,n .pivgtally 1. A. printing machine comprising acabi- 42o lum when said platen- BEST AVAILABLE COPi' I mounted; on" the cabinet and movable into engagement 'with the sheetvof glas's over the -open1ngin the cabinet, a resilient means for maintaining the platen suspended: above the glass; a pendulum" anounted' toroscillation onthec'abinet and resiliently connected with the" platn'i-whereby: said pendulum is held to a one iside-gof lthe: vertical when the platen-is suspendednabove' and out ofenga'gement with. the-sheet of glass, a: switch on the pendulum connected with a lighting circuit adapted to temporarily close the lighting c circuitwheni the platen is: moved into engagenient withthe sheet of glass and ing a printing 'opening in the top; a trans parent means supported over the'aopening, an electrically controlled: illuminating ;de- *vicein the rcabinet belo\v. :the opening-for the pendulum is oscillated, said circuit being adapted to be maintained open by the penduis :in normal inoperativeposition:

-2. In iaiprinting machine for the printing of photographicv print's', a cabinet provided with an opening; a transparent cover for the opening,- an illuminating device in the'lcabinet below said openlngpan electric circuit controlling the lightingdevice, a platen pivotally mounted 'on 'the cabinet, means for platen, a pendulum mounted for oscillation on the 'cabinet, :a resilient means connecting the pendulunr witlr Ythe depending arm,

whereby when theiplaten is elevated the pendulumis maintained at one'side ofthe vertical and whenz'lowered saidipendulum is released for oscillatiom anielectric contaction E the pendulumtforming one end ofthe lighting circuit, and eminent contact ;on the cabinet foriningthe other endof said circuit, said contact on the pendulum engaging the resilient contact when the pendulum is oscillated, said circuit'being adapted to be maintained open by the pendulum when said platen is in normal inoperative position.

3. In a printing machine for the printing of'photographic prints, a cabinet provided with an opening, -means-forsupporting a negative and a photographic paper over the opening, an illuminating device below'said *opening, an electric c1rcu1t controllingthe lighting device, 'a'platen pivotally mounted on the cabinet, a time element oscillatable on the cabinet and connected with the electric circuit for closing said circuit duringa portion of the time of the oscillation of the time element, and a connection between the 1 time element and the platenfor maintaining the time'element in inoperative position, and the circult open, said connection releasing the time element when the platen 1s moved onto the opening in the cabinet.

4.111 a printing machine for the printing "of photographic prints, a cabinet provided withan opening, means for supporting a I negative and a'photographic paper over the 1 opening, an illuminating device 'below' said :opening, an electric-circuit controlling the lighting 1 device, a platen pivotally' mounted onithe cabinet, a time element oscillatable 5. Ina printing machine, a cabinet havsupplying the white .light,-?;a rcircuiticon- I nected' with the illuminating device, liieans for varying the degree of; illumination, a platen pivotally mounted onthe cabinet-and resiliently"maintained in elevated: position and adapted to be moved.intoiengagement with the transparent means on' theopening in-the cabinet,'a pendulum mountedfor-kos 'cillation on the -cab1net, a resrhentuneans connecting the pendulum with thel'platen :gwhereby oscillationa-of :the platenv freleases theipendulum for-oscillation, andmeans on -the penduluntzfor opening -and-closing the circuit of the illuminating devicefthe pendulum being adapted to maintain- :the circuit normally open :whenithe platen is in an inoperative position. I

6. In a printing machine,

ing a printing openingin-the top,-a;trans 7 parent means supported over the opening, an electrically:controlled illuminating. de-

-vice' in the cabinet below the opening for supplyingfthe white light, a circuit connected with the illuminatingdevice, means for varying the degree of illumination, 21

platen pivotally mounted on the cabinet wand resiliently maintained'in elevated posit'ion and adapted to "be moved into engage ment with the transparent means' on the opening in the cabin'et',-a pendulum'mounted forzoscillat-ion on the cabinet, a resilient means connecting the pendulum with the platen whereby oscillation of the platen releases the pendulum for oscillation, means on the pendulum for opening and closing the circuit of the illuminating device and means connected with the pendulum for varying the time of illumination in the cabinet, the pendulum being adapted to maintain the circuit normally open when the platen is in an inoperative position.

7 In a printing machine comprising a cabinet having aprinting opening in the top, a sheet of glass supported over said opening, an electrically controlled illu1ni nating device in the cabinet, a circuit connected w th the i luminating device, a laten BEST AVAILABLE com mounted for oscillation -on the cabinet :and adapted -to be-projected 'into engagement with'the glass onthe opening in the cabinet, a pendulum mounted for-oscillationon the cabinet, a resilient contact on the cabinet, a second contact on the pendulum, means connecting the platen with the pendulum for maintaining the pendulum at an angle to the vertical, said means permitting oscillation of the pendulum when the platen is depressed whereby the contact on the pendulum will engage the fixed contact on the cabinet, said contacts being in circuit with the circuit connected with the illuminating device, the pendulum being adapted to maintain the circuit normally open when the platen is in an inoperative position.

8. In a printing machine comprising a cabinet having a printing opening in the top, a sheet of glass supported over said opening, an electrically controlled illuminating device in the cabinet, a circuit connected with the illuminz'iting device, a platen mounted for oscillation on the cabinet and adapted to be projected into engagement with the glass on the opening in the cabinet, a pendulum mounted for oscillation on the cabinet, a contact on the cabinet, a second contact on the pendulum, means connecting the platen with the pendulum for maintaining the pendulum at an angle to the vertical, said means permitting oscillation of the pendulum when the platen is depressed whereby the contact on the pendulum will engage the fixed contact on the cabinet, said contacts being in circuit with i the circuit connected with the illuminating device, and means for varying the time of oscillation of the pendulum, the pendulum through the platen being adapted to main tain the contacts out of engagement when the platen is in an inoperative position.

9. In a printing machine comprising a cabinet having printing opening in the top, a sheet of glass supported over said opening, an electrically controlled illuminating device in the cabinet, a circuit connected with the illuminating device, a platen mounted for oscillation on the cabinetand adapted to be projected into engagement with the glass on the opening in the cabinet, a pendulum mounted for oscillation on the cabinet, a contact on the cabinet, a second contact on the pendulum, means connecting the platen with the pendulum for maintaining the pendulum at an angle to the vertical and the contact on the pendulum out of engagement with the contact on the cabinet to maintain the circuit open, said means permitting oscillation of the pendulum when the platen is depressed whereby the contact on the pendulum will engage the fixed contact on the cabinet, said contacts being in circuit with the circuit connected with the illuminating device.

and projecting through the cabinet, a conductor connected with the circuit and spaced below the switches, operating rods engaging the switches for depressing the switches into contact with the conductor, and means for locking the operating rods in depressed position for maintaining the switches in contact with the conductor,

11. In aprinting machine for the printing of photographic prints, an illuminating device, means for supporting a negative and photographic printing paper in face to face engagement and within efi'ective relation with the illuminating device, means for regulating the intensity of the light in accordance with the density of the negative, and means for automatically efi'ecting illumination of the illuminating device, for definite periods of time and independently of the duration of the time the negative is supported on the supporting medium.

12. In a printing machine for the printing of photographic prints, an illuminating device, means for supporting a negative and photographic printing paper within efiective light exposed relation with the illuminating device, means for regulating the intensity of the light from the illuminating device in accordance with the density of the negative, means regulating the time of exposure in accordance with the speed of the photographic printing paper, and means automatically operating the electric illuminating device, for definite periods of time and independently of the duration of the time the negative is supported on the supporting medium.

13. In a printing machine for the printing of photographic prints, an illuminating device, means for supporting a negative and photographic printing paper within eifective light exposed relation with the illuminating device, means for regulating the intensity of the light from the illuminating device in accordance with the density of the negative, said illuminating means comprising an electric circuit, a plurality of lamps adapted to be connected with said circuit, one of said lamps being comprehended as a unit of light with the other lights progressively advanced in intensities to form multiples of the unit lights, and switches in the circuit for controlling the introduction of any or all of the lamps into the circuit.

14. In a printing machine for the printing of photographic prints, an illuminating device, a plurality of lamps adapted to be connected with said circuit, an electric conthe' (in electric circuit connected in 'series wit thelamps, switches connected" with the lamps BEST AVAILABLE COP\ ductor in the circuit andspaced from the lamps, switches connected with the lamps and spaced-above theconductor, aspring connected wlt-lteacll swltch and operated 1n advance ofthe switches for engagingthe engagement with the conductor,- and means f0l" 100 kipg,thG rods in position when the switches have beenclosed, said springs 10 adapted toreturn the rods to an inoperative position.

. IRA D SHARP. 

